常用金属或合金的线胀系数金属或合金温度T/℃线胀系数α/10E-6/℃金属或合金温度T/℃线胀系数α/10E-6/℃铝及铝合金碳钢20-10010.6-12.2106020-10020-30020-20011.3-13.0 110020-10020-40020-30012.1-13.5 201120-10020-60020-40012.9-13.9 201420-1002320-60013.5-14.3 202420-10022.820-70014.7-15.0221820-10022.3铬钢20-10011.2300320-10023.220-20011.8 403220-10019.420-30012.4 500520-10023.820-40013 505020-10023.820-60013.6505220-10023.8铸铁20-1008.7-11.1505620-10024.120-2008.5-11.6 508320-10023.420-30010.1-12.2 508620-10023.920-40011.5-12.7 515420-10023.920-60012.9-13.2 545620-10023.920-100017.6606120-10023.41020-10011.53606320-10023.420-20012.61 610120-1002320-30013 707520-10023.220-40013铜及铜合金20-50014.18纯铜2016.520-60014.6磷脱氧铜20-30017.71520-10011.75无氧铜20-30017.720-20012.41普通黄铜20-30020.320-30013.45低铅黄铜20-30020.220-40013.6中铅黄铜20-30020.320-50013.85高铅黄铜20-30020.320-60013.9超高铅黄铜20-30020.52020-10011.16铝青铜20-30016.420-20012.12铍青铜20-30017.8金属或合金温度T/℃线胀系数α/10E-6/℃金属或合金温度T/℃线胀系数α/10E-6/℃40CrNiMoA20-10011.718CrMn2MoBA 20-10012.3720-30012.720-20012.7335CrMoVA 20-10011.820-30013.17 20-20012.520-40013.6 20-30012.712Cr1320-10011.2 20-4001320-20012.6 20-50013.420-40014.1 20-60013.720-60014.3 20-7001420Cr1320-10010.538CrMoAlA 20-1001120-20011 20-20013.120-30011.5 20-3001320-40012 20-40013.520-50012 20-50013.530Cr1320-10010.2 20-60014.520-20011.130CrMnSiA 20-1001120-30011.6 20-20011.7220-40011.9 20-30012.9220-60012.3 20-40013.1320-70012.8 20-50013.9212Cr18Ni920-10016.6 20-60014.2320-20017 20-70014.5920-30017.230CrMnSiNi2A 20-10011.3720-40017.5 20-20011.6720-50017.8 20-30012.6820-60018.2 20-40012.920-70018.6 20-50013.5320-90019.3 20-60013.8414CrMn17Ni220-10010.3 20-70013.9720-20010.340CrMnSiMoA 20-10012.520-30011.2 20-2001320-40011.8 20-30013.320-50012.4节流件与管道常用材料的热膨胀系数/10E-6/℃Cr1720-50011金属或合金温度T/℃线胀系数α/10E-6/℃金属或合金温度T/℃线胀系数α/10E-6/℃15、A3-10010.612Cr1MoV20-1009.8-10.63 20-10011.7520-20011.3-12.35 20-20012.4120-30012.3-13.35 20-30013.4520-40013-13.6 20-40013.620-50012.84-14.15 20-50013.8520-60013.8-14.6 20-60013.920-70014.2-14.56A3F、B320-10011.510CrMo91020-10012.51020-10011.620-20013.6 20-20012.620-30013.6 20-4001320-40014 20-60014.620-50014.42020-10011.1620-60014.7 20-20012.1220-80013.5 20-30012.78Cr6SiMo20-10011.5 20-40013.3820-20012 20-50013.9320-40012.5 20-60014.3820-60013 20-70014.81X20CrMoWV12120-10010.8 20-80012.9320-20011.2 20-90012.4820-30011.6 20-100013.1620-40011.945-10010.620-50012.1 20-10011.5920-60012.3 20-20012.321Cr18Ni9Ti-10016.2 20-30013.0920-10016.6 20-40013.7120-2001720-50014.1820-30017.2 20-60014.6720-40017.5 20-70015.0820-50017.9 20-80012.520-60018.2 20-90013.5620-70018.6 20-100014.4普通碳钢20-10010.6-12.21Cr13、2Cr1320-10010.520-20011.3-13.0 20-2001120-30012.1-13.5 20-30011.520-40012.9-13.9 20-4001220-60013.5-14.3 20-5001220-70014.7-15.0Cr17-10010.05工业用铜20-10016.6-17.1 20-1001020-20017.1-17.2 20-2001020-30017.6 20-30010.520-40018-18.1 20-40010.520-60018.6金属或合金温度T/℃线胀系数α/10E-6/℃金属或合金温度T/℃线胀系数α/10E-6/℃2020-30012.786520-10011.8 20-40013.3820-20012.6 20-50013.9320-40013.3 20-60014.3820-50014 20-70014.8120-600142520-10011.1820Cr20-10011.3 20-20012.6620-20011.6 20-30013.0820-30012.5 20-40013.4720-40013.2 20-50013.9320-50013.7 20-60014.4120-60014.2 20-70014.8840Cr20-100113520-10011.720-20012 20-20011.920-30012.2 20-30012.720-40012.9 20-40013.420-50013.5 20-50014.0212Cr2Ni3A20-10011.8 20-60014.4220-20013 20-70014.8820-40014.74520-10011.5920-60015.6 20-20012.3212Cr2Ni4A20-10011.8 20-30013.0920-20013 20-40013.7120-40014.7 20-50014.1820-50015 20-60014.6720-60015.6 20-70015.0825CrNiWA20-100115020-1001220-30013 20-20012.420-60014 20-40013.337CrNi3A20-10011.6 20-50014.120-20013.2 20-60014.120-40013.420-60013.5金属或合金温度T/℃线胀系数α/10E-6/℃金属或合金温度T/℃线胀系数α/10E-6/℃17Cr18Ni920-100166Cr4Mo3Ni2WV 20-10011.120-50018.520-20011.213Cr11Ni2W2MoVA 20-1009.320-30011.9 20-20010.320-40012.5 20-30010.820-50013.1 20-40011.320-60013.1 20-50011.720-70013.3 20-60012.2GCr920-1001313Cr14Ni3W2VBA 20-1001020-20013.9 20-20010.320-40015 20-30010.620-60015.2 20-40010.9GCr1520-10014 20-50011.120-20015.1 20-60011.220-40015.640Cr10Si2Mo20-1001020-60015.845Cr14Ni14W2Mo 20-30017 20-50018 20-70018 20-9001912Cr18Mn9Ni5N 20-10015.5 20-20016.5 20-30017 20-40017.5 20-50018.8Cr12MoV 20-10010.9 20-40011.4 20-60012.2。